Plunger for tile-machines.



G. F. KBIL & G. P. MIOKELSON.

PLUNGER POR TILE MACHINES.

APPLIGATION FILED MAY 15. 1908.

911,245. Patent-,ed Feb.2,19o9. [27%,] 'ZZISS/llf l. Z /1 l t! Z l IH FN" PM f Mm f 6 5 /W 6 h\\\ G. P. KEIL & C. F. MIGKELSON.

PLUNGER POR TILE MACHINES.

APPLIOATION FILED MAY 15, 190e.

91 1,245. Patented Feb. 2, 1909.

2 SHEETS-SHEET 2.

Fig ff E 7 www mm@- YW Cir 'unirse srarps learner onirica GEORGE F. KEIL AND CHRISTAN F. MICKELSON, OF SHERBRN, MINNESOTA.

PLUNGER FOR TILE-MACHINES.

Application filed May 15, 1908.

ySpecification of Letters Patent.

Eatented Feb. 2, 1909.

Serial No. 433,014.

To all whom it may concern.'

Beit known that we, GEORGE F. Kim. and CHRISTIAN F. MroKnLsoN, citizens of the United States, residing at Sherburn, in the county of `Martin and State of lilinnesota, have invented. certain new and useful lm p'rovements in Flungers for Tile-Machinesg and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I I

Our invention has for its object to provide an improved plunger or presser head for tile making machines wherein concrete or other plastic vtile forming material is pressed into a cylindrical shell or casing, by a combined endwise and rotary movement of the plunger or presser head.

To the above ends, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

This invention may be treated. as an improvement on the plunger for tile machines sot forth and claimed in Letters Patent issued to George F. Keil of date October 22, 1907, 491868,866. ln said prior patent the body of the plunger or presser head was of cast iron and in the form of an inverted bell or hollow shell having cavities or cam acting surfaces in its opposite sides g and the said plunger was provided ith a detachable external follower ring of hardened metal and with detachable hardened wearing blocks located above the follower ring and at the points of the cam surfaces where the greatest wear would come upon the head. ln the present improved plunger the detachable and adjustable hardened. follower ring is employed, but instead of simply using hardened metal wearing blocks above the follower ring, a sectional hardened ring is detachably applied to the plunger above the so-called follower ring, and the sections thereof are circumferentially tapered soy that they make up the entire packing surface of the plunger.

ln the accompanying drawings which illustrate our invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure l shows the improved plunger in side elevation. Fig. 2 shows the plunger in side elevation, viewed at 90 degrees from the direction in which it is viewed in Fig. 1. Fig. 3 is a plan view of the plunger. Fig. 4; is a bottom plan view of the same. Fig. 5 is a section taken. on the line x5 x5 of Fig. 7. Fig. 6 is a section taken on the line fc x0 of Fig. 7. Fig. 7 is a horizontal section taken on the line x7 rl of Fig. 5. Fig. 8 is horiz ntal. section taken on the line x8 x8 of Fig. 6; and Fig. 9 is a fragmentary view in section on the same line as Fig. 7, but illustratiiO1 a slightly modiiied construction.

The body of the hollow plunger or presser head is indicated by the numeral l, the same being preiere bly provided at its upper end with an internally threaded shank 2, to which the usual plunger stem may be ap plied in the customary way. The external surface of this improved plunger, instead of tapering upward on a convexly curved line, tapers upward on a concavely curved line, so that a larger body of vthe cement or plastic material is permitted to lie immediately adjacent to the cylindrical shell or casing (not shown) against which the formed tile is pressed by the plunger. The extreme lower end portion of the plunger body l is of cylindrical form and it is sun rounded by a follower ring 3, preferably of hardened steel. This follower ring 3 is split at one point, indicated at 3a, and it is detachably secured to the cylindrical end. of the plunger by short nutted bolts Ll, the heads of which are tapered and counter-sunk into the said ring, best shown in Fig. S. To compensate for the wear of the follower ring 3 a thin parl strip (not shown) of metal, paper, or other suitable material may from time to time be interposed between the said follower ring and the cylindrical ond of the plunger body.

l ust above the follower' ring 3 the plunger body l is formed with a follower groove or seat that is adapted to receive the inner portion of a sectional hardened packing ring, preferably constructed of hardened steel and made up of two segmental ring sections and two segmental ring sections 6. The relatively thin segmental ring sections 5 are tapered only at one end, as indicated at 5, but the relatively thick ring sections 6 are circumferentially tapered from end to end, all as best shown in Fig. 7. The ring sections 5 are also tapered longitudinally of the plunger body, as shown in Figs. 2 and 6, and the relatively thin ends ef the ring sections 6 are correspondingly tapered, but the thick extremities of the said ring sections 6 are straight or approximately straight, as shown in Figs. l and 5. The said ring sections 5 and 6 are detachably clamped to the body of the plunger by means of short nutted bolts 7, the heads of which are tapered and counter-sunk into the said sections, as best shown in Fig. 7. To compensate for wear, thin packing strips of metal, paper or other suit-able material may from time to time be interposed between the said sections 5 6 and the body of the plunger.

Fig. 9 illustrates a modification in which one of the ring sections is shown as detachably secured to the body of the plunger by means of staples or yokes 8 and wenges 9. The said staples or yokes 8 have their ends seated in and riveted or otherwise secured to the said section 6 and the body thereof is projected through a suitable passage in said plunger body, and the wedge 9 is driven through the said staple on the inner side of the said plunger body. rhis same device may be used in lieu of the nutted bolts to de tachably and adjustably secure the ring sections 5 and the follower ring 3 to the plunger body.

W hen the improved plunger is moved endwise and rotated within the cylindrical outer shell or casing to form the tile within the latter, the packing action is produced by the ring sections 5 and 6, and especially by the latter, which effect the linal packing of the plastic material. lThe follower ring smootlis up the inner surface of the tile a d holds the same in shape for a short time after it has been acted upon by said sections 6. The sections 5 and 6 of the follower ring 3, even when made of very hard or highly tempered steel, will wear away quite rapidly, but they may be quite cheaply replaced when conipletely worn out; and, furthermore, by placing proper spacing strips of paper or other suitable material between the same and the body of the plunger they may be radially adjusted so that they may be used until almost completely Worn out. rlhe body of the plunger reinforced with the sectional acking ring and follower ring will last 1ndefimtely or for a very great length of time.

In practice we have found this improved plunger to be much more efficient in its action and much more durable than the plunger disclosed in the patent to Keil ab ve identified.

"will hat we claim is:

l. A plunger of the kind described, having a rigid detachable sectional packing ring of relatively hard metal, closely fitting the plunger circuinferentially, certain sections of which are circumferentially tapered, substantially as described.

2. A plunger of the kind described, having a detachable sectional packing ring constructed of relatively hard metal, certain of the sections thereof being tapered longitudinally of the plunger and other sections thereof being tapered circumferentially of said plunger` with their relatively thin ends tapered longitudinally of said plunger, and with their relatively thick ends extending approximately parallel to the axis of said plunger, substantially as described.

3. A plunger of the kind described, having a detachable follower ring applied to the lower end portion thereof and having just above said follower ring a detachable sectional packing ring, certain of the sections of which are tapered circumferentially of said plunger with their relatively thin ends tapered longitudinally of said plunger and with their relatively thick ends extending approximately parallel to the axis of said plunger and coincident with perimeter of said fol-' 

